Chemical Elements | MCQs

Explanation

Diamond is a solid form of pure carbon with its atoms arranged in a crystal.

Explanation

The first evidence of helium was observed on August 18, 1868

 as a bright yellow line with a wavelength of 587.49-nanometers in the spectrum of the chromosphere of the Sun.

The line was detected by French astronomer Jules Janssen during a total solar eclipse in Guntur, India.

Explanation

Joseph Priestly discovered oxygen on August 1, 1774.

The most abundant element in the Earth's crust is oxygen, making up 46.6% of Earth's mass

Explanation

 Titanium element has an atomic number of 22 and a mass of 47.90

Explanation

Gold is element 79 and its symbol is Au.

Though the name is Anglo Saxon, gold originated from the Latin Aurum, or shining dawn, and previously from the Greek